CN105568378B - A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker - Google Patents
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker Download PDFInfo
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- CN105568378B CN105568378B CN201610012651.1A CN201610012651A CN105568378B CN 105568378 B CN105568378 B CN 105568378B CN 201610012651 A CN201610012651 A CN 201610012651A CN 105568378 B CN105568378 B CN 105568378B
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- C—CHEMISTRY; METALLURGY
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/62—Whiskers or needles
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- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
- C30B7/10—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by application of pressure, e.g. hydrothermal processes
- C30B7/105—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by application of pressure, e.g. hydrothermal processes using ammonia as solvent, i.e. ammonothermal processes
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Abstract
The invention discloses a kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, this method is included under lasting stirring, lead, boron atom are mixed by certain mol ratio, the suspension of gained enriching ammoniacal liquor dropwise, the milk-like slurry of gained, which is transferred in reactor, carries out solvent thermal reaction, the slurry of gained obtains lead borate whisker through cooling down, filtering, wash, dry.The present invention have studied the pattern of prepared lead borate whisker, and the compound with regular structure of the lead borate whisker of preparation, size are unified, crystallinity is high, and with preferable neutron gamma ray shielding performance；In addition, this kind of material of lead borate is received more and more attention in fields such as chemical catalysis, photoelectricity, optics, and expands a large amount of theoretical researches and application and development, thus, the preparation method for the lead borate whisker that the present invention is provided, is that its multifunctional application has paved road；Raw material of the present invention is easy to get, cheap, and product processing is easy, can amplify carry out industrial-scale production.
Description
Technical field
Possesses multi-functional and knot the invention belongs to the synthesis technical field of micrometer/nanometer inorganic material, more particularly to one kind
The preparation method of the regular lead borate whisker of structure.
Background technology
As nuclear technology is in the fast development in the fields such as national defence, scientific research and civilian industry, people touch high energy particle
Probability gradually increases, and its species shows variation, and such as neutron, gamma-rays, proton seriously threaten the body of the mankind
Body health.Conventional radiation protective materials can not meet current efficient and light weight and diversified requirement of shelter, such as mobile reactor
With can carry radiation source etc..Thus, prepare the material with a variety of high energy particle safeguard functions and excellent combination property outstanding
For necessity.In numerous high energy particles, gamma-rays and neutron have features and with representing meaning.The former is a kind of wavelength
Extremely short electromagnetic wave, possesses extremely strong penetration capacity, and the damage that can not be repaired again, canceration even gene are produced to organism and is dashed forward
Become；The latter is a kind of extremely strong particle of not charged, penetration power, and other rays of the hazard ratio caused to organism are bigger.Radiation is anti-
The ability that protective material such as possesses both high energy particles of decaying just can apply to the radiation protection that current a variety of high energy particles coexist
Place.Gamma-rays, such as lead it is well known that heavy element can decay；And light element can absorb thermal neutron, such as boron.It is domestic at present
Use concrete and polymer-based composite more outer neutron-gamma-rays protective materials, i.e., will have neutron and γ to penetrate respectively
Line attenuation material is filled to base material.But different the light of atomic number, heavy element settle in composite preparation process, are layered
Phenomenon substantially, it is difficult to meet the requirement of excellent combination property, is unfavorable for the application and popularization of neutron-gamma-rays protective materials.
Based on this, present invention selection is combined with chemical bond form has gamma-rays and the lead and boron of neutron attenuation ability respectively
Element, obtains a kind of boric acid lead compound.In most cases, lead (II) borate generally by high temperature solid state reaction or passes through
One complicated hydrothermal synthesis method is borate.For example, melting boric acid has been used as one kind as a kind of reaction-ability medium
Easy production method.But this method product is usually associated with large-size and component segregation phenomenon.Central Symmetry is used respectively
Structure or previously synthesized hydrothermal system obtain target crystal in high temperature, high pressure or in a complicated Hydrothermal System.With
These methods are compared, the synthesis of solvent thermal reaction method at moderate temperatures with very big advantage, process it is relatively easy and
Crystalline material that is easily controllable, being conducive to the crystallinity prepared higher.In addition, different reaction conditions, such as temperature, stoichiometry
Than, the time, and there may be the boric acid leading crystal of different morphologies for the pH value of reaction medium.
The content of the invention
It is an object of the invention to provide a kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, purport
Solve different the light of atomic number, heavy element settle in composite preparation process, lamination it is obvious, it is difficult to meet comprehensive
Close the requirement of excellent performance, the problem of being unfavorable for the application and popularization of neutron-gamma-rays protective materials.
The present invention is achieved in that a kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, should
The preparation method of lead borate whisker comprises the following steps：
Step one, under continuous agitation, respectively by lead acetate (PbAc2) be dissolved in deionized water, add boric acid
(H3BO3), add pyridine until solution is in suspension, lead, boron atom are mixed by certain mol ratio；
Step 2, under continuous agitation, appropriate concentrated ammonia liquor is added dropwise to the suspension obtained by step one, until
The white milk-like slurry of solution；
Step 3, the milk-like slurry obtained by step 2 is transferred in reactor and carries out solvent thermal reaction, is necessarily being reacted
Certain time is reacted under temperature conditionss；
Step 4, by the slurry obtained by step 3 solvent heat treatment through cooling, filtering, washing, drying steps, obtains one kind
Lead borate whisker.
Further, in the step one, lead, boron atom mol ratio are 1:6-1:15.
Further, in the step 3, reaction temperature is 180 DEG C -240 DEG C.
Further, in the step 3, the reaction time is 4h-24h.
Further, in the step 4, washing process is using deionized water and absolute ethyl alcohol cyclic washing 3-10 times.
Further, it is direct using the preparation method of the present invention for possessing multi-functional and compound with regular structure lead borate whisker
The crystal whisker-shaped lead borate crystal diameter of acquisition is 100-500nm, and draw ratio is 200-1000.
A kind of lead borate whisker prepared by the present invention is to combine to have gamma-rays and neutron attenuation respectively with chemical bond form
The lead and boron element of ability, can obviously improve the functional stuffing caused by lead and boron density variation in conventional composite materials scattered not
, and possesses decay neutron and gamma-ray ability.Meanwhile, the anisotropy feature of lead borate whisker can promote composite
The raising of combination property, such as mechanical property.In addition, this kind of material of lead borate the fields such as chemical catalysis, photoelectricity, optics by
Increasing concern, and a large amount of theoretical researches and application and development are expanded, thus, a kind of lead borate whisker that the present invention is provided
Preparation method, be that its multifunctional application has paved road；
The present invention also has the following advantages that：The present invention utilizes the bars such as lead, boron atom mol ratio, reaction temperature, reaction time
The pattern that systematically have studied prepared lead borate whisker and its neutron of part-gamma ray shielding performance.Prepared in the present invention
A kind of compound with regular structure of lead borate whisker, size are unified, crystallinity is high, and with preferable neutron-gamma ray shielding performance；Boron
This kind of material of lead plumbate is received more and more attention in fields such as chemical catalysis, photoelectricity, optics, and is expanded a large amount of theories and ground
Study carefully and application and development.Thus, a kind of preparation method for lead borate whisker that the present invention is provided is that its multifunctional application has paved road
Road；Raw material of the present invention is easy to get, cheap, and product processing is easy, can amplify carry out industrial-scale production.
Brief description of the drawings
Fig. 1 is the preparation method flow provided in an embodiment of the present invention for possessing multi-functional and compound with regular structure lead borate whisker
Figure；
Fig. 2 is the X-ray powder diffraction figure of lead borate whisker provided in an embodiment of the present invention；
Fig. 3 is the scanning electron microscope (SEM) photograph of lead borate whisker provided in an embodiment of the present invention；
Fig. 4 is the selection electronic diffraction (a) and high power transmission electron microscope picture of lead borate whisker provided in an embodiment of the present invention
(b)；
Fig. 5 is lead borate whisker provided in an embodiment of the present invention and lead oxide and neutron-gamma-rays of boron oxide mixture
(wherein, lead borate quality is 4 grams to shielding properties comparison diagram, and the mould for being placed in 5 cm diameters tests neutron gamma-rays after compacting
Shielding properties；Pb is consistent with lead borate whisker with B atomic molars quality in mixture；Neutron source is thermal neutron, gamma ray projector energy
Measure as 105.3keV).
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, by raw material of lead acetate and boric acid in
It is well mixed in pyridine, solution ph, agitating solution is adjusted with concentrated ammonia liquor until in milkiness shape slurries, obtaining at ambient temperature
White flock presoma, carries out hydro-thermal reaction in a kettle., and a kind of lead borate whisker is made.
Below in conjunction with the accompanying drawings and specific embodiment to the present invention application principle be further described.
Such as Fig. 1：A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, the system of the lead borate whisker
Preparation Method comprises the following steps：
S101：Under continuous agitation, respectively by lead acetate (PbAc2) be dissolved in deionized water, add boric acid
(H3BO3), add pyridine until solution is in suspension, lead, boron atom are mixed by certain mol ratio；
S102：Under continuous agitation, appropriate concentrated ammonia liquor is added dropwise to the suspension obtained by step one, until molten
The white milk-like slurry of liquid；
S103：Milk-like slurry obtained by step 2 is transferred in reactor and carries out solvent thermal reaction, in certain reaction temperature
Certain time is reacted under the conditions of degree；
S104：By the slurry obtained by step 3 solvent heat treatment through cooling, filtering, washing, drying steps, a kind of boron is obtained
Lead plumbate whisker.
In the S101, lead, boron atom mol ratio are 1:6-1:15.
In the S103, reaction temperature is 180 DEG C -240 DEG C.
In the S103, the reaction time is 4h-24h.
In the S104, washing process is using deionized water and absolute ethyl alcohol cyclic washing 3-10 times.
Directly obtained using the preparation method of the present invention for possessing multi-functional and compound with regular structure lead borate whisker
Crystal whisker-shaped lead borate crystal diameter is 100-500nm, and draw ratio is 200-1000.
Fig. 2 is the X-ray powder diffraction figure of lead borate whisker provided in an embodiment of the present invention；
Fig. 3 is the scanning electron microscope (SEM) photograph of lead borate whisker provided in an embodiment of the present invention；
Fig. 4 is the selection electronic diffraction (a) and high power transmission electron microscope picture of lead borate whisker provided in an embodiment of the present invention
(b)；
Fig. 5 is lead borate whisker provided in an embodiment of the present invention and lead oxide and neutron-gamma-rays of boron oxide mixture
(wherein, lead borate quality is 4 grams to shielding properties comparison diagram, and the mould for being placed in 5 cm diameters tests neutron gamma-rays after compacting
Shielding properties；Pb is consistent with lead borate whisker with B atomic molars quality in mixture；Neutron source is thermal neutron, gamma ray projector energy
Measure as 105.3keV).
The application principle of the present invention is further described with reference to specific embodiment.
Embodiment 1：
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, comprises the following steps：
(1) under lasting stirring condition, lead acetate is dissolved in deionized water and then boric acid, pyridine is added until solution is in
Suspension, wherein, lead, boron atom mol ratio are 1:10；
(2) under lasting stirring condition, concentrated ammonia liquor is added dropwise into the suspension obtained by step 1, until solution is in white
Color milk-like slurry；
(3) the white " milky " slurries obtained by step 2 are transferred in reactor and carry out solvent thermal reaction, in 240 DEG C of conditions
The lower reaction 4h times；
(4) slurry obtained by step 3 is finally given into a kind of white powder through cooling, filtering, washing, drying process, point
Not Cai Yong X-ray diffraction (XRD), SEM (SEM) and transmission electron microscope (TEM) analysis, it was demonstrated that it is
Lead borate whisker, its result is similar with Fig. 2, Fig. 3 and Fig. 4.
Embodiment 2：
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, comprises the following steps：
(1) under lasting stirring condition, lead acetate is dissolved in deionized water and then boric acid, pyridine is added until solution is in
Suspension, wherein, lead, boron atom mol ratio are 1:6；
(2) under lasting stirring condition, concentrated ammonia liquor is added dropwise into the suspension obtained by step 1, until solution is in white
Color milk-like slurry；
(3) the white " milky " slurries obtained by step 2 are transferred in reactor and carry out solvent thermal reaction, in 220 DEG C of conditions
The lower reaction 15h times；
(4) slurry obtained by step 3 is finally given into a kind of white powder through cooling, filtering, washing, drying process, point
Not Cai Yong X-ray diffraction (XRD), SEM (SEM) and transmission electron microscope (TEM) analysis, it was demonstrated that it is
Lead borate whisker, its result is similar with Fig. 2, Fig. 3 and Fig. 4.
Embodiment 3：
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, comprises the following steps：
(1) under lasting stirring condition, lead acetate is dissolved in deionized water and then boric acid, pyridine is added until solution is in
Suspension, wherein, lead, boron atom mol ratio are 1:15；
(2) under lasting stirring condition, concentrated ammonia liquor is added dropwise into the suspension obtained by step 1, until solution is in white
Color milk-like slurry；
(3) the white " milky " slurries obtained by step 2 are transferred in reactor and carry out solvent thermal reaction, in 180 DEG C of conditions
The lower reaction 24h times；
(4) slurry obtained by step 3 is finally given into a kind of white powder through cooling, filtering, washing, drying process, point
Not Cai Yong X-ray diffraction (XRD), SEM (SEM) and transmission electron microscope (TEM) analysis, it was demonstrated that it is
Lead borate whisker, its result is similar with Fig. 2, Fig. 3 and Fig. 4.
Embodiment 4：
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, comprises the following steps：
(1) under lasting stirring condition, lead acetate is dissolved in deionized water and then boric acid, pyridine is added until solution is in
Suspension, wherein, lead, boron atom mol ratio are 1:12；
(2) under lasting stirring condition, concentrated ammonia liquor is added dropwise into the suspension obtained by step 1, until solution is in white
Color milk-like slurry；
(3) the white " milky " slurries obtained by step 2 are transferred in reactor and carry out solvent thermal reaction, in 220 DEG C of conditions
The lower reaction 10h times；
(4) slurry obtained by step 3 is finally given into a kind of white powder through cooling, filtering, washing, drying process, point
Not Cai Yong X-ray diffraction (XRD), SEM (SEM) and transmission electron microscope (TEM) analysis, it was demonstrated that it is
Lead borate whisker, its result is similar with Fig. 2, Fig. 3 and Fig. 4.
Embodiment 5：
A kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, comprises the following steps：
(1) under lasting stirring condition, lead acetate is dissolved in deionized water and then boric acid, pyridine is added until solution is in
Suspension, wherein, lead, boron atom mol ratio are 1:9；
(2) under lasting stirring condition, concentrated ammonia liquor is added dropwise into the suspension obtained by step 1, until solution is in white
Color milk-like slurry；
(3) the white " milky " slurries obtained by step 2 are transferred in reactor and carry out solvent thermal reaction, in 200 DEG C of conditions
The lower reaction 18h times；
(4) slurry obtained by step 3 is finally given into a kind of white powder through cooling, filtering, washing, drying process, point
Not Cai Yong X-ray diffraction (XRD), SEM (SEM) and transmission electron microscope (TEM) analysis, it was demonstrated that it is
Lead borate whisker, its result is similar with Fig. 2, Fig. 3 and Fig. 4.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (3)
1. a kind of preparation method for possessing multi-functional and compound with regular structure lead borate whisker, it is characterised in that the lead borate whisker
Preparation method comprise the following steps：
Step one, under continuous agitation, respectively by lead acetate be dissolved in deionized water, add boric acid, add pyridine until
Solution is in suspension, and lead, boron atom are mixed by certain mol ratio；
Step 2, under continuous agitation, concentrated ammonia liquor is added dropwise to the suspension obtained by step one, until solution is in white
Color milk-like slurry；
Step 3, the milk-like slurry obtained by step 2 is transferred in reactor and carries out solvent thermal reaction, in certain reaction temperature
Under the conditions of react certain time；
Step 4, by the slurry obtained by step 3 solvent heat treatment through cooling, filtering, washing, drying steps, obtains a kind of boric acid
Lead whisker；
In the step one, lead, boron atom mol ratio are 1:6-1:15；
In the step 3, reaction temperature is 180 DEG C -240 DEG C；
In the step 3, the reaction time is 4h-24h.
2. possess the preparation method of multi-functional and compound with regular structure lead borate whisker as claimed in claim 1, it is characterised in that
In the step 4, washing process is using deionized water and absolute ethyl alcohol cyclic washing 3-10 times.
3. possess the preparation method of multi-functional and compound with regular structure lead borate whisker as claimed in claim 1, it is characterised in that
The crystal whisker-shaped lead borate crystal diameter of the preparation is 100-500nm, and draw ratio is 200-1000.
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| CN1552958A (en) * | 2003-05-30 | 2004-12-08 | 青海海兴科技开发有限公司 | Preparing process for antifungin crystal whisker |
| CN1556259A (en) * | 2003-12-31 | 2004-12-22 | 国家海洋局天津海水淡化与综合利用研 | Preparation method of magnesium borate whisker |
| CN100569645C (en) * | 2006-01-25 | 2009-12-16 | 青海中信国安科技发展有限公司 | A kind of high length-diameter ratio antifungin whisker synthesis method |
| CN100375795C (en) * | 2006-09-08 | 2008-03-19 | 清华大学 | Magnesium borate whisker hydrothermal synthesis preparation method |
| CN102154682B (en) * | 2011-05-04 | 2012-10-24 | 中国科学院青海盐湖研究所 | Preparation method of calcium borate whisker |
| CN103046113B (en) * | 2011-10-11 | 2015-04-15 | 中国科学院新疆理化技术研究所 | Compound lead borate and nonlinear optical crystal of lead borate, preparation method thereof and purpose thereof |
| CN103866385A (en) * | 2012-12-11 | 2014-06-18 | 毛华军 | Magnesium borate crystal whisker preparation method |
| CN103014860B (en) * | 2012-12-21 | 2017-06-06 | 中国科学院福建物质结构研究所 | Nonlinear optical crystal boric acid lead and its preparation and use |
| CN104562196B (en) * | 2013-10-23 | 2017-04-12 | 中国科学院新疆理化技术研究所 | Compound lead borate hydrate nonlinear optical crystal and preparation method and use thereof |
| CN104562208A (en) * | 2013-10-23 | 2015-04-29 | 中国科学院新疆理化技术研究所 | Compound mono-boric dihydroxyl calcium decaborate monohydrate nonlinear optical crystal and preparation method and use thereof |
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